Hi, I'm a local and have been to the Takeover several years.
If the event is the same as it has been for the past four years (and I assume that it will be), there will be a package available for around $100 per person that includes a ticket, a bus ride from Slattery's in mid-town Manhattan (bar where DolphansNYC is based out of) to the stadium, a ticket for food and drink at a tailgate (drinks might be limited so you might have to bring a six-pack of beer for yourself) and a bus ride back from the stadium to Slattery's.
There should also be an event at Slattery's the day before the game. Often a former player(s) will be there (in the past they've had Sam Madison and Jay Fiedler) and some raffles for memorabilia.
If you don't want to do the package, you should probably be able to get a cheap ticket on stubhub. You can take NJ Transit from Penn Station to the stadium for about $15 each way, assuming Amtrak has finished its repairs by then.
Hope this helps.